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Full Discussion: How to compare data from 2 zip files and capture the new records from file2 to a new file
Top Forums Shell Programming and Scripting How to compare data from 2 zip files and capture the new records from file2 to a new file Post 302578489 by Corona688 on Thursday 1st of December 2011 04:17:03 PM
Old 12-01-2011
Those should be .gz or .z, not .zip.
Code:
$ man zcat

GZIP(1)                                                                GZIP(1)



NAME
       gzip, gunzip, zcat - compress or expand files

SYNOPSIS
       gzip [ -acdfhlLnNrtvV19 ] [-S suffix] [ name ...  ]
       gunzip [ -acfhlLnNrtvV ] [-S suffix] [ name ...  ]
       zcat [ -fhLV ] [ name ...  ]

DESCRIPTION
       Gzip  reduces  the  size  of  the  named  files using Lempel-Ziv coding
       (LZ77).  Whenever possible, each file  is  replaced  by  one  with  the
       extension .gz, while keeping the same ownership modes, access and modi-
       fication times.  (The default extension is -gz for VMS,  z  for  MSDOS,
       OS/2  FAT, Windows NT FAT and Atari.)

Actual zip is difficult to use in a pipe chain.

Knowing what you have, I'd do this:

Code:
mkfifo data1 data2
zcat < a.gz > data1 &
zcat < b.gz > data2 &

awk 'BEGIN { while(getline <"data1") L[$0]=1 }; !L[$0]' data2

wait
rm -f data1 data2

---------- Post updated at 03:17 PM ---------- Previous update was at 03:13 PM ----------

A simplified version:

Code:
mkfifo data1
zcat < a.zip > data1 &
zcat < b.zip | awk 'BEGIN { while(getline <"data1") L[$0]=1 }; !L[$0]'
wait
rm data1

 

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LEARN ABOUT DEBIAN

getds

GETDS(1p)						User Contributed Perl Documentation						 GETDS(1p)

NAME

       getds - Create a DS record from DNSKEYing information

SYNOPSIS

	 getds <domain>

DESCRIPTION

       getds will create a DS record from DNSKEYs for the specified DNS domain.  It does this by converting DNSKEYs to DS records using the
       specified hashing algorithm.  The results can then be passed to upstream DNSSEC-supporting parents or to DLV registries.

       getds will also pull the parent's published DS records and compare them against the existing keys.  It will then list any DS records not
       published in the parent, as well as any DS records that are published in the parent but which don't match an existing key.

OPTIONS

       getds takes the following options:

       -a ALGORITHMS
       --hash-algorithm algorithm ALGORITHMS
	   This option specifies the hash algorithm to use when converting DNSKEYs to DS records.  It may be a comma-separated list if multiple
	   algorithms are desired.  The algorithms to choose from may be either SHA256 or SHA1.

	   The default is SHA256,SHA1

       -z
       --print-zsks
	   This option causes getds to print ZSK DS records, as well as KSK records.

       -p
       --dont-check-parent
	   Instructs getds to not check the records in the parent for their published DS records.

       -q
       --quiet
	   Produces quiet output with no explanatory headers.  In other words, it only prints the DS records generated from the DNSKEYs.

	   Note: Running with -q implies -p.

SECURITY CONSIDERATIONS

       By default, getds pulls data from the live DNS.	If your DNS resolver isn't configured so that this is pulled securely, then the results
       can't be trusted.

COPYRIGHT

       Copyright 2008-2012 SPARTA, Inc.  All rights reserved.  See the COPYING file included with the DNSSEC-Tools package for details.

AUTHOR

       Wes Hardaker, hardaker AT AT AT users.sourceforge.net

perl v5.14.2							    2012-06-21								 GETDS(1p)
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